rotating ball display device

例句：

1. 1.The car's engine is rotating smoothly.
   汽车的引擎正在平稳地旋转。
2. 2. The wheel on the bike is rotating clockwise.
   自行车上的轮子正在顺时针旋转。
3. 3.The satellite is rotating around the earth at a high speed.
   卫星以高速围绕地球旋转。